Here is Roger's outfit for the French Open which is starting next week. It is mainly blackish grey with bright yellow detailing, I think it looks better than his blue one in Madrid and Rome. It reminds me of Rafa's 'assassin' outfit for US Open 2010, he crushed everyone on his way to victory, hopefully Roger will do the same. 

He doesn't seem to have a different colour one for different conditions, I don't exactly agree with playing in hot day with black, previously we saw Fed using two different colour outfits - In US Open 10 and 11, he was wearing the black and grey polo in night matches and blue and red in day.